Felipe Maffezzolli
@FeMaffezzolli
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I build digital companies that solve real problems.
Sao Paulo, Brazil
Joined October 2023
Climbing Mount Everest without oxygen supplementation is a great feat. Skiing all the way down is unbelievable. https://t.co/zJyCD1ahsB
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Green flags in a React codebase 🟢 Next.js 🟢 TypeScript 🟢 Tailwind 🟢 tRPC 🟢 .cursorrules
Red flags in a React codebase 🚩 functions named handleClick,handleSubmit 🚩 preventDefault 🚩 useMemo 🚩 fetch inside useEffect 🚩 <div onClick/> 🚩 a "hooks" directory 🚩 css files 🚩 icon library in package.json
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@SawyerMerritt Bezos isn’t chasing another shiny chatbot. He’s quietly aiming at the boring, trillion-dollar layer: AI that moves atoms — factories, supply chains, engineering. First wave was models. Next wave is whoever wires them into the real economy.
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Database Join support coming to @better_auth!! Cutting latency by 2-3x across more than 50 endpoints!
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Upstash Realtime is the easiest way to add realtime to Next.js ◆ 2-minute setup, no infrastructure ◆ Perfect for serverless & Vercel ◆ Just works™ in any Next.js app Example: live cursor tracking 👇
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Sorte = probabilidade de um evento favorável acontecer para você Você pode aumentar a sua sorte
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🔥 The Ultimate TypeScript Stack [ BACKEND ] ~ Server Framework: @honojs / @elysiaJS (running on @bunjavascript) ~ Authentication: @better_auth ~ Database: Self-hosted Postgres / @tursodatabase ~ ORM: @DrizzleORM ~ Caching & Queue: @upstash ~ Ratelimit: @upstash / @unkeydev ~
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Concepts You’ll Only Learn After a Year in Production
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How I work as a full-time engineer while also shipping MVPs for my own clients fast: 🧩 Core: Next.js · tRPC · Drizzle · PostgreSQL · TanStack Query 🎨 UI: shadcn/ui · Tailwind CSS · Framer Motion 🔐 Auth & Payments: Better Auth · Polar 🤖 AI: AI SDK 5 · Mastra ⚙️ Infra:
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aprenda - node.js - fastify - react.js - postgres - redis - bullmq - feature flags
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Zero-configuration support for NestJS backends, now on Vercel. NestJS joins frameworks like Express, FastAPI, Flask, and Hono, all supported via framework-defined infrastructure. https://t.co/nsrLjghfwg
vercel.com
Vercel now detects and deploys NestJS, a framework for building efficient, scalable Node.js server-side applications, with zero configuration.
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I stole this idea and now use it with every single employee. It’s the best illustration I’ve seen of teaching someone to be high agency. It says there are 5 levels of work: Level 1: “There is a problem.” Level 2: “There is a problem, and I’ve found some causes.” Level 3:
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Just pushed Evalite 0.12.0! - Dark mode - AI SDK v5 Support - Bugfixes & UI Improvements All the big features driven by community contributions. Thank you! Enjoy: https://t.co/lHlHtWWdPU
evalite.dev
Evalite makes evals simple. Test your AI-powered apps with a local dev server.
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My favourite addition to prompts is: "Be extremely concise. Sacrifice grammar for the sake of concision." MUCH easier to scan, less reading overhead, cheaper to output. Before and after:
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“Mom, how did we get so poor?” “Your dad spent all his time listening to podcasts about founders but never built anything”
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4 sinais de que você está estagnado na carreira de dev: 1 - Não tem desafios técnicos 2 - Faz tarefas repetitivas todo mês 3 - Ninguém te reconhece pelo que entrega 4 - Seu salário não mostra o nível que você tem
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